Compression check

droutte

Seaman Apprentice
Joined
Jan 8, 2004
Messages
37
I would like to check the compression on my<br />1989 Johnson 150hp OB. Will a standard compression<br />tester from a auto store work? And how close should the readings be to each other?<br /><br />Thanks<br />Dan
 

MCM

Lieutenant Junior Grade
Joined
Jun 1, 2005
Messages
1,201
Re: Compression check

Hi Dan, <br /><br />A standard automotive tester should work just fine. The readings should all be within 10-15% of each other I beleive.
 
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